Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b5dfdbcd00f4b3e79c1f21b59317c675957df3054744239b1ca9d4576683109' 
  AND token = 'j9na+icmAytLlCvmB2UzcEKPCkFfcwxW/svbINEsCBs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}